Staple



Sept. 18,V 1928.

J. B. cRoFooT A l sTAPLE Filed April 4, 1927 Fatented Sept. Y19a, 1923.

' LUNITE STATES,

l resins.

PATENT oFFrlcgE.

Jenn B. onoroofr, or aannemen '.arirfiirii's,v ILLINOIS.

s'rArLn.

Y Appncatin :ned April 4,

perforated means on the staple units andA particularly on the mutilated final unit to be engaged bythe feed pawl of the stapling machine for the purpose of facilitating the positive and automatic expulsion of the mutilated `final unit from the stapling machine7 thereby preventing clogging of the machine and permittingl the nnhampered insertion of a newstaple strip.

This application is a. division of my pending application, Serial No. 65,270, filed October 2S, 1925.

The invention willbest be understood by reference to the accompanying drawing forming` a part of this specification and in which, y

Fig. 1 is an elevational view partly in cross-section of a stapling machine showing an entire staple unitk together with a mutilated unit of my improved staple strip in position in the machine.

Fig. 2 is a horizontal sectional view taken on approximately the line 2-2 of Figure 1.

Fig. 3 is a plan view of part of ay staple strip.

Fig. 4; is an end` view of that disclosed in Figure 3.

n the accompanying drawing l have shown one form of my invention in position on a stapling` machine provided with plunger 11 which has a slot with a cam face 12 on one side, for receiving and for actuating a. bolt 13, thereby moving the feed pawl a forward and backward by the reciproeation of said pawl, in order to feed the strip 15, a unit at a time.

A hold back pawl 16 is pivoted onthe frame of the machine and is spring-pressed to engage the staple strip, and preferably to engage in an opening provided in said strip.

The staple strip consists of a plurality or a series of entire staple units 17 having pointed fingers 18 on each side, and a inutilated final staple unit 19y at the end of the strip, as best shown in Figure 3. mach of said staple units 19, as well as the entire units 19, has perforations 2O provided on the back portion or main body portion there 1an'.` u serial no. 180,767. Y

offer receiving thefeed pawl 14, as best shown in Figure 2; and an opening 21 is provided in the connecting part or neck be-l tween a pairof adjoining unit-s, and directly across the line o f cut or separation 4between said units, forreceiving the hold bach pawl 16 to prevent return movement ofsaid staple strip when-fthe feed pawl 14. moves rearwardly. Y

pawl 14 engages in opening`s20 and feeds the forward unit into position under the plunger 11, as indicated in Figures 1 and 2, and when the last entire unit hasl been'fed, theV feed pawl 14 engages back of the shoulders 19 at the rear end of the mutilated final unit, and when the plunger 11 has returned to its upper position, with the bolt 13 and feed pawl 14 thereupon moved into their forward position, the engagement of pawl 14 against shoulders 19 will positively expel said final unit from the st-aplin'g machine.

-By thus arranging the perforations across the back or main body portion of the staple unit, for receiving the feed pawl dur-- ing normal feedingmovements of the machine, instead of feed pawl engaging baci: ofthe side extension or legs of the staple units, the complete or entire units are fed forwardly into the position shown in Figure 2, and upon the last stroke of the pawl is enabledto engage behind shoulders 19 and during its forward movement, to move the same sufficiently forward to tilt and positively expel said final unit from the machine.

t See unit 19 dotted in Figure 2.)

It is apparent from the above disclosure that the strip and each staple unit therein" is moved rearwardly behind said shoulders and. thereupon moves it straight forward, out of the machine.

While I havedescribed the preferred form .of construction for carrying my invention into effect, this is capable of variation with- '.65 During the feeding of the staple strip, feed` nism of a stapling machine, whereb out departing from the spirit of the `invention. I do not, therefore, wish to be limited to the precise details of construction set forth, but desire to avail myself ofl such variations and modicationsas come within the scope of the appending claims.

I claim as my invention:

1. A staple strip having a mutilated staple at one end thereof and provided with means arranged to be engaged by the feed mechanism of a stapling machine, whereby said mutilated staple is automatically and positively ejected from said machine.

2. A staple strip having a mutilated staple at one end thereof and integral therewith and provided with a feed shoulder arranged to be engaged by the feed mecha sai mutilated staple is automatically an positively ejected from said machine.

3. A staple strip having a mutilated staple at one end thereof and integral therewith provided with rearwardly .extending means arranged tobe engaged by the feed pawl of a stapling `machine, whereby said mutilated staple is ypositively ejected from i said machine.,

4. A staple strip having a mutilated staple at one end thereof and provided with means, varranged at therear of said mutilated staple, and perforations in said mutilated staple to be engaged by feeding pawla` of astapling machine, for positive and automatic ejection from said machine by said ment with a feeding pawl of a stapling machine, for positive and automatic ejection from said machine, by said pawl.

In testimony whereof I have signed my name to this specification.

JOHN B. cnoiioo'r.y 

